If you have filed your Income Tax Returns online and have not used digital signature, you need take print out of ITR V Form and send it to Income Tax Office in Bangalore. The dates for the same had been extended to December 31, 2012 earlier. So in case you are still wondering if your ITR V form has reached Income Tax Department, you can check the same online on Income Tax Website.
You need to just fill either your PAN Card and Assessment Year or eFiling Acknowledgement Number and the status of ITR V is shown.
Here are some screenshots:
Submit the form to get the status of ITR V: